Function parse_expression

pub fn parse_expression(input: &str) -> Result<Expression, ParserError>

Parses a mathematical expression from a string. As of now, the user must use full notation for floating point values.

Examples

Basid usage:

use math_engine::context::Context;
use math_engine::expression::Expression;
use math_engine::parser::parse_expression;

let expr = parse_expression("1.0 + x").unwrap();
let ctx = Context::new().with_variable("x", 4.0);
let eval = expr.eval_with_context(&ctx).unwrap();

assert_eq!(eval, 5.0);

Errors

An error is returned if the string could not be parsed.